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64 lines
1.5 KiB
Objective-C
64 lines
1.5 KiB
Objective-C
#import <Foundation/Foundation.h>
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NS_ASSUME_NONNULL_BEGIN
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// A base class that abstracts away a source of NSData
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// and allows us to:
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//
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// * Lazy-load if possible.
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// * Avoid duplicate reads & writes.
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@interface DataSource : NSObject
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@property (nonatomic, nullable) NSString *sourceFilename;
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// Should not be called unless necessary as it can involve an expensive read.
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- (NSData *)data;
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// The URL for the data. Should always be a File URL.
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//
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// Should not be called unless necessary as it can involve an expensive write.
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//
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// Will only return nil in the error case.
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- (nullable NSURL *)dataUrl;
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// Will return zero in the error case.
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- (NSUInteger)dataLength;
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// Returns YES on success.
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- (BOOL)writeToPath:(NSString *)dstFilePath;
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- (BOOL)isValidImage;
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- (BOOL)isValidVideo;
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@end
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#pragma mark -
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@interface DataSourceValue : DataSource
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+ (nullable DataSource *)dataSourceWithData:(NSData *)data fileExtension:(NSString *)fileExtension;
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+ (nullable DataSource *)dataSourceWithData:(NSData *)data utiType:(NSString *)utiType;
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+ (nullable DataSource *)dataSourceWithText:(NSString *_Nullable)text;
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+ (DataSource *)dataSourceWithSyncMessageData:(NSData *)data;
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+ (DataSource *)emptyDataSource;
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@end
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#pragma mark -
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@interface DataSourcePath : DataSource
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+ (nullable DataSource *)dataSourceWithURL:(NSURL *)fileUrl shouldDeleteOnDeallocation:(BOOL)shouldDeleteOnDeallocation;
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+ (nullable DataSource *)dataSourceWithFilePath:(NSString *)filePath
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shouldDeleteOnDeallocation:(BOOL)shouldDeleteOnDeallocation;
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@end
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NS_ASSUME_NONNULL_END
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